<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 ===0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染其他权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="item3 in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="角色操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRolesById(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFromRules" ref="addFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
      <el-button @click="addDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="addRoles">确 定</el-button>
     </span>
    </el-dialog>

    <!-- 修改用户对话框 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
       <el-button @click="editDialogVisible = false">取 消</el-button>
       <el-button type="primary" @click="editUserInfo">确 定</el-button>
     </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
      >
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="defaultProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights()">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  /** *********************data**********************/
  data () {
    return {
      // 所有角色列表数据
      roleList: [],
      // 控制添加角色对话框开启与否
      addDialogVisible: false,
      // 表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则对象
      addFromRules: {
        roleName: [
          { required: true, message: '请输入角色名称', tigger: 'blur' }
        ],
        roleDesc: [
          { min: 0, max: 70, message: '角色描述长度在70个字符以内', tigger: 'blur' }
        ]
      },
      // 控制修改对话框关闭与否
      editDialogVisible: false,
      // 修改表单数据对象
      editForm: {},
      // 修改表单验证对象
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', tigger: 'blur' }
        ],
        roleDesc: [
          { min: 0, max: 70, message: '角色描述长度在70个字符以内', tigger: 'blur' }
        ]
      },
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 权限数据
      rightsList: [],
      // 树形控件的绑定对象
      defaultProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的节点值
      defKeys: [],
      // data中保存角色id
      roleId: ''
    }
  },
  /** *********************data**********************/

  /** *********************created**********************/
  created () {
    this.getRolesList()
  },
  /** *********************created**********************/

  /** *********************methods**********************/
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
      this.roleList = res.data
      // console.log(res)
    },
    // 关闭添加角色对话框后的回调
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 添加角色的方法
    addRoles () {
      this.$refs.addFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        // 发起真正的添加操作
        // console.log('发起请求')
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) return this.$message.error('添加角色失败')
        this.$message.success('添加成功')
        this.addDialogVisible = false
        this.getRolesList()
      })
    },
    // 修改对话框关闭后的回调
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 真正修改角色信息的方法
    editUserInfo () {
      console.log(this.editForm)
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改用户信息的请求
        const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
        if (res.meta.status !== 200) this.$message.error('更新用户信息失败')
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新用户列表
        this.getRolesList()
        // 提示
        this.$message.success('更新用户信息成功')
      })
    },
    // 显示修改对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get(`roles/${id}`)
      if (res.meta.status !== 200) return this.message.error('获取角色失败')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 根据ID删除对应角色
    removeRolesById (roleId) {
      // 弹框提示用户是否删除
      this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(res => {
        this.$http.delete(`roles/${roleId}`).then(result => {
          // console.log(result)
          if (result.data.meta.status !== 200) return this.$message.error('删除失败')
          this.getRolesList()
          this.$message.success('删除成功')
        })
      }).catch(status => {
        return this.$message.info('用户取消删除')
      })
    },
    // 根据ID删除对应的权限
    removeRightById (role, rightId) {
      // 弹框提示用户是否删除
      this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.$http.delete(`roles/${role.id}/rights/${rightId}`).then(res => {
          if (res.data.meta.status !== 200) return this.$message.success('删除权限失败')
          this.$message.success('删除成功')
          role.children = res.data.data
          // this.getRolesList()
        })
      }).catch(status => {
        return this.$message.info('用户取消删除')
      })
    },
    // 展示分配权限的对话框
    showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限数据
      this.$http.get('rights/tree').then(response => {
        const res = response.data
        if (res.meta.status !== 200) return this.$message.error('获取权限数据失败')
        this.rightsList = res.data
        // console.log(this.rightsList)
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      })
    },
    // 递归获取角色所有3级权限ID
    getLeafKeys (node, arr) {
      // 不包含children节点 即为3级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 清空角色权限ID
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 确定分配权限
    allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr }).then(response => {
        const res = response.data
        if (res.meta.status !== 200) return this.$message.error('分配权限失败')
        this.$message.success('分配权限成功')
        this.getRolesList()
        this.setRightDialogVisible = false
      })
    }
  }
  /** *********************methods**********************/
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}

.bdtop{
  border-top: 1px solid #eeeeee;
}

.bdbottom{
  border-bottom: 1px solid #eeeeee;
}

.vcenter{
  display: flex;
  align-items: center;
}
</style>
